GranisetronAntiemeticsVomitingNauseaSerotonin AntagonistsOndansetronReceptors, Serotonin, 5-HT3Serotonin 5-HT3 Receptor AntagonistsProchlorperazineVomiting, AnticipatoryMetoclopramideReceptors, SerotoninQuipazineDexamethasoneGaggingIsonipecotic AcidsDouble-Blind MethodIndazolesDroperidolSerotonin 5-HT3 Receptor AgonistsTympanoplasty5-MethoxytryptamineSerotoninPreanesthetic MedicationPostoperative Nausea and Vomiting